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Proceedings Paper

Realistic QKD system hacking and security
Author(s): Fred Daneshgaran; Marina Mondin; Judy Kupferman; Shlomi Arnon; Marco Genovese; Ivo Degiovanni; Alice Meda; Francesco Di Stasio; Inam Bari
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Paper Abstract

This paper discusses the most relevant aspects of the practical implementation of a long-range Quantum Key Distribution (QKD) link with trusted nodes, achieving the highest possible secret key rate generation within the security and system level constraints. To this purpose, the implementation of an end-to-end QKD system will be discussed, including implementation aspects from physical transmission of photon states through a standard telecommunications grade optical fiber, to consideration of device imperfections, information reconciliation protocols. In addition, since there are circumstances when a fiber optical link may not be available, we will also discuss a test bench implementation of a Free Space Optics (FSO) QKD link.

Furthermore, in spite of the fact that Discrete Variable QKD (DV-QKD) systems have reached a maturity level that allows their potential full realization and implementation for creation of a secure network backbone for key distribution in nations, in realistic links DV-QKD is really limited by technology and physical constraints associated with construction of reliable high rate single photon (or at least low photon count) sources, and of fast and reliable single photon detectors with very low dark count rates. In these cases, the use of Continuous Variable QKD (CV-QKD) schemes may be advantageous. For this reason the paper also discusses the problem of information reconciliation in CVQKD scenarios, showing that in long distance links the sign of the received Gaussian samples contains the largest fraction of information, leading to the design of an Unequal Error Protection (UEP) reverse reconciliation scheme.

Paper Details

Date Published: 18 September 2018
PDF: 11 pages
Proc. SPIE 10771, Quantum Communications and Quantum Imaging XVI, 107710T (18 September 2018); doi: 10.1117/12.2321519
Show Author Affiliations
Fred Daneshgaran, California State Univ., Los Angeles (United States)
Marina Mondin, California State Univ., Los Angeles (United States)
Politecnico di Torino (Italy)
Judy Kupferman, Ben-Gurion Univ. of the Negev (Israel)
Shlomi Arnon, Ben-Gurion Univ. of the Negev (Israel)
Marco Genovese, Istituto Nazionale di Ricerca Metrologica (Italy)
Ivo Degiovanni, Istituto Nazionale di Ricerca Metrologica (Italy)
Alice Meda, Istituto Nazionale di Ricerca Metrologica (Italy)
Francesco Di Stasio, Politecnico di Torino (Italy)
Inam Bari, National Univ. of Computer and Emerging Sciences (Pakistan)

Published in SPIE Proceedings Vol. 10771:
Quantum Communications and Quantum Imaging XVI
Ronald E. Meyers; Yanhua Shih; Keith S. Deacon, Editor(s)

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